Suppose the value of $x$ varies from $x=-4$ to $x=-10$. a. Did $x$ increase or decrease? Select an answer $\vee$ b. If $x$ continues varying in this direction without limit, which of the following is true? Select all that apply. $x \rightarrow \infty$ $x$ increases without bound $x$ decreases without bound $x \rightarrow-\infty$

Step 1 ：Suppose the value of $x$ varies from $x=-4$ to $x=-10$.

Step 2 ：Compare the initial and final values of $x$.

Step 3 ：If the final value is less than the initial value, then $x$ has decreased. If the final value is greater than the initial value, then $x$ has increased.

Step 4 ：The final value of $x$ is less than the initial value, so $x$ has decreased.

Step 5 ：Final Answer: $x$ has \(\boxed{decreased}\).